ca. 1350

“Hebrew and the Practice of Judaism outlawed” [Ethiopia] [Unconfirmed] 

Commentary from other sources:
1) “From the 14th century onward, with the brief exception of the rule of one Jewish emperor named Tewodros II in the 1800’s, the vast majority of  Ethiopian Jews were forced to live as powerless and exploited landless peasants.”
“The History of Ethiopian Jewry;”